1. AN AUTOMATIC FOUL LINE INDICATOR FOR DESIGNATING THE VIOLATION OF A FOUL LINE COMPRISING A TAKE-OFF BOARD HAVING AN UPPER SURFACE AND HAVING AN EDGE SUBSTANTIALLY COINCIDENT WITH SAID FOUL LINE, A FOUL BOARD HAVING TWO ENDS, AN UPPER SURFACE, A LOWER SURFACE AND AN EDGE SUBSTANTIALLY FLUSH WITH SAID EDGE OF SAID TAKE-OFF BOARD, MEANS NORMALLY URGING SAID FOUL BOARD IN AN UPWARD DIRECTION TO RAISE SAID UPPER SURFACE OF SAID FOUL BOARD SLIGHTLY ABOVE SAID UPPER SURFACE OF SAID TAKE-OFF BOARD, A PAIR OF INDICATOR WINGS FIXED AT RIGHT ANGLES TO EACH OTHER ADJACENT AT LEAST ONE END OF SAID FOUL BOARD, ROD AND SLEEVE MEANS PIVOTALLY SUPPORTING SAID PAIR OF WINGS ABOUT THE VERTEX OF SAID RIGHT ANGLE, TRIGGER MEANS NORMALLY MAINTAINING ONE OF SAID INDICATOR WINGS IN A SUBSTANTIALLY HORIZONTAL PLANE WHILE THE OTHER OF SAID WINGS EXTENDS UPWARDLY IN A SUBSTANTIALLY VERTICAL PLANE COINCIDENT WITH SAID FOUL LINE, LEVER MEANS RESPONSIVE TO A DEPRESSION OF SAID FOUL BOARD TO RELEASE SAID TRIGGER MEANS AND SPRING-TENSIONED MEANS TO PIVOT SAID INDICATOR WINGS ABOUT SAID ROD AND SLEEVE MEANS WHEN SAID TRIGGER MEANS IS RELEASED SO THAT SAID OTHER WING IS IN A SUBSTANTIALLY HORIZONTAL PLANE AND SAID ONE WING EXTENDS UPWARDLY IN A SUBSTANTIALLY VERTICAL PLANE.